A Trisomy guide line built with content contributions by volunteer writers....
Trisomy is a chromosomal abnormality due to excess of chromosomes, generally associated with causing syndromes and mental disorders.
A human gamete cell has 23 chromosomes which pairs with another 23 of the other parent making 46 chromosomes in total.
Complications in this phenomenon can sometimes cause the creation of an extra copy of a chromosome that cannot be paired.
Thus Trisomy is a polysomy where at least one chromosome is formed in excess to the normal count of 23.
Trisomies can happen in any of the chromosomes, but almost always ends in miscarriage, while rare cases lead to complications.
Common trisomies are Trisomy 8, Trisomy 9, Trisomy 13, Trisomy 18, Trisomy 21, Trisomy 22, the numbers corresponding to order of the chromosome with trisomy.
Trisomy 13, Trisomy 18, Trisomy 21 usually leads to Patau, Edwards and Down syndrome respectively.
Doctors can detect a possible trisomy by observing the psychical features of the newborn infant and treat the infant accordingly.
For instance congenital heart defect is the most common effect of Trisomy 13 among infants and doctor can easily identify and treat it accordingly.
Trisomy 21 on the other hand causes mental disorders or mental retardation wherein intervention is required in the later stages of the child’s growth.
Written by Emmanuel S.
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